CN103453966B - A kind of non-water flushing device of toilet with infrared distance measurement fluid level measuring instrument - Google Patents
A kind of non-water flushing device of toilet with infrared distance measurement fluid level measuring instrument Download PDFInfo
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- CN103453966B CN103453966B CN201310362520.2A CN201310362520A CN103453966B CN 103453966 B CN103453966 B CN 103453966B CN 201310362520 A CN201310362520 A CN 201310362520A CN 103453966 B CN103453966 B CN 103453966B
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Abstract
nullThe present invention provides a kind of infrared distance measurement fluid level measuring instrument，Head is measured including infrared level、Infrared level measures cylinder、Cursory、Aperture and fixing device，Infrared level is measured head and is arranged on the top of infrared level measurement cylinder，Aperture is all offered in cylinder top and the bottom，Infrared level is measured cylinder and is connected by fixing device with the container containing liquid，Infrared level measures the head amount of being fixed on cylinder top，It is cylindrical shape or other shapes that infrared level measures cylinder，It is placed in liquid or and fluid communication，In the cursory inner cylinder being placed in infrared level measurement cylinder，For semi-cylindrical or half cone-shaped，Can be adjusted according to the shape measuring cylinder，Distance H2 between being measured head acquisition infrared level measurement head by infrared level and be cursory，The distance H1 that infrared level is measured between bottom head and liquid containing container is known，Thus obtaining liquid level is H2-H1.Additionally provide a kind of non-water flushing device of toilet using above-mentioned infrared distance measurement fluid level measuring instrument.
Description
Technical field
The present invention relates to the application of a kind of infrared distance measurement type fluid level measuring instrument, particularly relate to a kind of a kind of New-type toilet non-water flushing device being applied in by this infrared distance measurement type fluid level measuring instrument on a kind of non-water flushing device of toilet and being formed.
Background technology
The water closet of modern civilization invention brings health and comfortable life to us, but, the water pollution problems produced due to tradition sewerage system got the attention in the last few years, raw sewerage is just in polluted underground water, river, lake and coastal area, and water resource is very deficient at present, therefore invention one has flushing pump, but it is very useful and necessary not adopt the lavatory tool using water as flushing liquor.A kind of Punching and bore edge drawing mould is applicants have invented by this (application), lavatory tool includes an apparatus for detecting human body, one circuit control device, one W.C.pan, one pulverizes and centrifugal device, a upper strata flushing liquor flushing pump, a collection flushing liquor case, one excrement collecting box, deodorization medicinal liquid automatic adding device and a multiple piping installation.Wherein the Level Detection for collection flushing liquor case is a crucial technology, if the DATA REASONING for liquid level is accurate not, then be divided into contact and contactless two kinds owing to non-water rinses current fluid level measuring instrument.Wherein contact type measurement includes float-ball type, liquid plug-in type, and it major downside is that fluid level measuring instrument is easily corroded by liquid level, or the interference effect being subject to unclean liquid is measured.And contactless level gauging generally adopts pressure type, by sensing head induced liquid pressure thus being converted into corresponding level value.Washing machine is generally adopted in this way, but due to the divergence characterization of ultrasound wave self, certainty of measurement is extremely low.Additionally also have reliability compared with traditional glass tubing (plate) liquidometer higher, safety and practicality be better magnetic float level indicator also, make according to law of buoyancy and magnetic couplings effect, when the liquid level in tested container lifts, magnetic float in liquidometer body tube also lifts therewith, permanent-magnet steel in float is delivered to magnetic column indicator by magnetic coupling, red white turned column is driven to turn over turnback, when liquid level rises, turned column is changed into redness by white, when liquid level declines, turned column is changed into white by redness, the actual height that red white intersection is internal tank liquid level of indicator, indicate clearly thus realizing liquid level.But magnetic float level indicator is expensive, it is usually voltage or current mode data transfer mode, is therefore unfavorable for that distance transmits data.The use scope of current float type level gauge is relatively wide, but in application process, there is also some problems needing to solve.Such as in the occasion of smaller range and relatively short measuring distances, go to toilet the monitoring in tool, if adopting traditional ultrasonic measurement, corrugated is dispersed, as adopted laser measurement, product cost is too high, and for the level gauging of transparency liquid, owing to laser measurement needs reflecting surface to meet some requirements, its popularization and application in level gauging also can be affected.Therefore adopting some application scenario of design that laser and ultrasound wave carry out float level meter to seem less practical, fault rate is higher, and certainty of measurement is relatively low.
Summary of the invention
In view of above analysis, the main purpose of the present invention is to provide a kind of liquidometer using infrared distance measurement head to carry out level gauging, and utilizes this liquidometer to carry out collecting on non-water flushing device the application of flushing liquor case Level Detection.This liquidometer is mainly measured head by infrared level, and infrared level measures cylinder, cursory, and aperture and circle tube fixing device form.It is cylindrical shape that described infrared level measures cylinder, can also is that other shapes, such as triangle or square tube shape or polygonal cylinder, place in a liquid or and fluid communication, the lateral wall of cylinder adopts the container inner wall that fixing device contains with testing liquid to be connected, in the described cursory inner cylinder being placed in infrared level measurement cylinder, cursory can adopt semicolumn or half cone-shaped, described cursory can also be adjusted according to the shape measuring cylinder, for instance be triangle or polygonal tubular or taper for cross section.Described infrared level is measured head and is accurately fixed on described infrared level and measures the top of cylinder, and what described infrared level measured cylinder all offers some apertures up and down, consequently facilitating ventilative and permeable.
The present invention also aims to provide a kind of non-water flushing device using this infrared distance measurement type liquidometer, wherein this device includes an apparatus for detecting human body, a circuit control device, a W.C.pan, pulverizing and a centrifugal device, one upper strata flushing liquor flushing pump, one collection flushing liquor case, one excrement collecting box, one deodorization medicinal liquid automatic adding device, wherein collection flushing liquor case is collected urine and is rinsed stool, and in casing, the liquid level of urine adopts infrared distance measurement type liquidometer to carry out the measurement of liquid level.Wherein infrared level measures the model of head can be GP2D120X.
The technical solution used in the present invention is as follows:.
nullThis employing infrared distance measurement head carries out the fluid level measuring instrument of level gauging，Its operation principle is: after switching on power，Adopt range finding head，Range finding head is arranged on the top of test system，The position just liquid occurred，Range finding head is fixed on infrared level and measures cylinder top，It is cylindrical shape that infrared level measures cylinder，Place in a liquid or and fluid communication，The lateral wall of cylinder adopts the container inner wall that fixing device contains with testing liquid to be connected，In the described cursory inner cylinder being placed in infrared level measurement cylinder，Infrared level measure cylinder all offer some apertures up and down，Consequently facilitating it is ventilative and permeable，By infrared distance measurement head，Namely infrared level measures the infrared signal vertical irradiation that goes out of hair on cursory，Single-chip microcomputer is adopted to carry out Real-time Collection，Obtain voltage signal，Operating characteristic according to range finding head is reduced into distance signal，Namely the distance H2 between obtaining infrared level measurement head and being cursory，In general，The scope of H2 is limited between 4cm to 50cm，That measure head due to described infrared level and distance H1 between the bottom of liquid containing container is known，Thus obtaining liquid level is H2-H1.
Further, the method adopting infrared distance measurement head carries out level gauging, wherein infrared distance measurement head can adopt SHARP range finding head, its model can be GP2D120X, the signal of range finding head is sent to single-chip microcomputer and carries out the modulation of signal, process and conversion, and be connected with peripheral control circuits by 485 interfaces, control the action of subsequent execution device.
Further, described infrared distance measurement type liquidometer adopt infrared level measure cylinder, cursory for fixing, make infrared ray can with compared with high verticality be radiated at cursory on, wherein said infrared level is measured the lateral wall of cylinder and is adopted the container inner wall that fixing device contains with testing liquid to be connected, and wherein said fixing device can adopt fixing screw.
Further, what adopt in described infrared distance measurement type liquidometer cursory can adopt semi-cylindrical, it would however also be possible to employ half cone-shaped.
Further, adopting the non-water flushing device of toilet of this infrared distance measurement type liquidometer, lavatory tool includes an apparatus for detecting human body, a circuit control device, a W.C.pan, a pulverizing and centrifugal device, a upper strata flushing liquor flushing pump, collection flushing liquor case, an excrement collecting box, deodorization medicinal liquid automatic adding device and a multiple piping installation.By defecation recognizer, judge if urine, then circuit control device starts upper strata flushing liquor flushing pump motor and pulverizes the motor with centrifugal device, upper strata flushing liquor in collection flushing liquor case is pumped the front opening flowing into W.C.pan along flushing liquor pipeline by upper strata flushing liquor flushing pump, and W.C.pan is rinsed.Wherein need the liquid level of collection flushing liquor case is judged, determine whether to need to add water or other medicinal liquids auxiliary flushing stool, or liquid level is too high wants automatic drain, it is determined whether can starting flushing process of defecating, the liquid level emasuring device adopted is the infrared distance measurement type liquidometer of the application.
This fluid level measuring instrument is stable, reliable, easy for installation, simple in construction, can under the environment that liquid fluctuating is bigger, the real-time detection of dynamic liquid level change is realized within the scope of small space and relatively short distance, can also under the metastable environment of liquid level, realizing the high-acruracy survey of liquid level, the critical component level gauging for Closet without water provides conveniently detection means.And the non-water flushing device of toilet that have employed this fluid level measuring instrument has been carried out many experiments, and occurring urine to overflow and urine is 0 not up to the False Rate of rinsing requirement amount, experiment proving effect is fine.
Accompanying drawing explanation
Accompanying drawing 1 is fluid level measuring instrument structural representation conventional at present；
Accompanying drawing 2 is infrared distance measurement type fluid level measuring instrument structural representation of the present invention；
The non-water flushing device of toilet structure chart that accompanying drawing 3 is applied for infrared distance measurement type fluid level measuring instrument of the present invention.
Above-mentioned number in the figure title: 1-fluid level measuring instrument；2-infrared level measures head；3-infrared level measures cylinder；4-is cursory；5-aperture；6-fixes device；7-apparatus for detecting human body；8-circuit control device；9-W.C.pan；10-pulverizes and centrifugal device；11-upper strata flushing liquor flushing pump；12-collection flushing liquor case；13-excrement collecting box；14-deodorization medicinal liquid automatic adding device.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention will be described in detail.
Referring to fluid level measuring instrument 1 structural representation that accompanying drawing 1 is conventional at present, the method for this measurement liquid level and instrument are usually used in measuring the liquid level of opaque liquid.Such as, a kind of Water coal slurry thick liquid location laser measuring set disclosed in CN200975907Y, including water-coal-slurry bucket and the laser range finder that is disposed there above, the outfan of laser range finder is connected to the input of laser range finder change-over circuit, in this device known with the distance height of sensing device from water-coal-slurry pot bottom to Laser emission, and need measure be laser beam emitting device arrive water-coal-slurry liquid level actual measure distance height, thereby through the two difference obtain water-coal-slurry liquid level mirror measure after actual range height.
Accompanying drawing 2 is the structural representation of infrared distance measurement type fluid level measuring instrument of the present invention.This infrared distance measurement type fluid level measuring instrument includes that infrared level measures 2, infrared level measures cylinder 3, cursory 4, aperture 5 and fixing device 6, wherein, described infrared level measurement 2 is arranged on described infrared level and measures the top of cylinder 3, aperture 5 is all offered in the top and the bottom of described cylinder, thus carrying out ventilative and permeable, described infrared level measures cylinder 3 and the container containing liquid adopts fixing device 6 to be attached.nullThe operation principle of this fluid level measuring instrument is: after switching on power，Adopt range finding head，Infrared level measurement 2 is arranged on the top of test system，The position just liquid occurred，Described infrared level measurement 2 is fixed on described infrared level and measures cylinder 3 top，It is cylindrical shape that infrared level measures cylinder 3，Can also is that other shapes，Such as triangle or square tube shape or polygonal cylinder，Place in a liquid or and fluid communication，The lateral wall of cylinder adopts the container inner wall that fixing device contains with testing liquid to be connected，Described cursory 4 are placed in the inner cylinder that infrared level measures cylinder 3，Such that it is able to retrain cursory transverse horizontal motion，Cursory can be under no restraint move up and down with liquid level，Drum diameter is unsuitable excessive，Thus affect liquid level relatively low time measurement effect，Infrared level measure cylinder all offer some apertures up and down，Consequently facilitating it is ventilative and permeable，Why adopt small structure，It is mainly in view of and inside and outside liquid level both can be kept unimpeded，Can also the impact of liquid level self be reduced to minimum by the change of physical arrangement，By infrared distance measurement head，Namely infrared level measures a 2 infrared signal vertical irradiation sent on cursory 4，Single-chip microcomputer is adopted to carry out Real-time Collection reflected signal，Obtain voltage signal，Operating characteristic according to range finding head is reduced into distance signal，Namely the infrared level measurement distance H2 between 2 and cursory 4 is obtained，That measure head due to described infrared level and distance H1 between the bottom of liquid containing container is known，Thus obtaining liquid level is H2-H1.
Further, the method adopting infrared distance measurement head carries out level gauging, wherein infrared distance measurement head can adopt SHARP range finding head, its model can be GP2D120X, the signal of range finding head is sent to single-chip microcomputer and carries out the modulation of signal, process and conversion, and be connected with peripheral control circuits by 485 interfaces, control the action of subsequent execution device.
Further, described infrared distance measurement type liquidometer adopt infrared level measure cylinder, cursory for fixing, make infrared ray can with compared with high verticality be radiated at cursory on, wherein said infrared level is measured the lateral wall of cylinder and is adopted the container inner wall that fixing device contains with testing liquid to be connected, and wherein said fixing device can adopt fixing screw.
Further, what adopt in described infrared distance measurement type liquidometer cursory can adopt semi-cylindrical, half cone-shaped can also be adopted, described cursory can also according to measure cylinder shape be adjusted, it is such as triangle or polygonal tubular or taper for cross section, such mechanism may insure that cursory minimum with cylinders contact area, and the disturbance of level gauging is also minimum.
Referring to accompanying drawing 3, adopting the non-water flushing device of toilet of this infrared distance measurement type liquidometer, lavatory tool includes apparatus for detecting human body 7, circuit control device 8, W.C.pan 9, pulverizing and centrifugal device 10, upper strata flushing liquor flushing pump 11, collection flushing liquor case 12, excrement collecting box 13, deodorization medicinal liquid automatic adding device 14 and multiple piping installation.By defecation recognizer, judge if urine, then circuit control device 8 starts the motor of upper strata flushing liquor flushing pump 11 and pulverizes the motor with centrifugal device 10, upper strata flushing liquor in collection flushing liquor case 12 is pumped the front opening flowing into W.C.pan 9 along flushing liquor pipeline by upper strata flushing liquor flushing pump 11, and W.C.pan 9 is rinsed.Wherein need the liquid level of collection flushing liquor case 12 is judged, determine whether to need to add water or other medicinal liquids auxiliary flushing stool, it is determined whether can starting flushing process of defecating, the liquid level emasuring device adopted is the infrared distance measurement type liquidometer of the application.
The first embodiment of the present invention is to provide a kind of infrared distance measurement type liquid level sensor, this infrared distance measurement type fluid level measuring instrument includes that infrared level measures 2, infrared level measures cylinder 3, cursory 4, aperture 5 and fixing device 6, wherein, described infrared level measurement 2 is arranged on described infrared level and measures the top of cylinder 3, aperture 5 is all offered in the top and the bottom of described cylinder, thus carrying out ventilative and permeable, described infrared level measures cylinder 3 and the container containing liquid adopts fixing device 6 to be attached.nullThe operation principle of this fluid level measuring instrument is: after switching on power，Adopt range finding head，Infrared level measurement 2 is arranged on the top of test system，The position just liquid occurred，Described infrared level measurement 2 is fixed on described infrared level and measures cylinder 3 top，It is cylindrical shape that infrared level measures cylinder 3，Place in a liquid or and fluid communication，The lateral wall of cylinder adopts the container inner wall that fixing device contains with testing liquid to be connected，Described cursory 4 are placed in the inner cylinder that infrared level measures cylinder 3，Such that it is able to retrain cursory transverse horizontal motion，Cursory can be under no restraint move up and down with liquid level，Drum diameter is unsuitable excessive，Thus affect liquid level relatively low time measurement effect，Infrared level measure cylinder all offer some apertures up and down，Consequently facilitating it is ventilative and permeable，Why adopt small structure，It is mainly in view of and inside and outside liquid level both can be kept unimpeded，Can also the impact of liquid level self be reduced to minimum by the change of physical arrangement，By infrared distance measurement head，Namely infrared level measures a 2 infrared signal vertical irradiation sent on cursory 4，Single-chip microcomputer is adopted to carry out Real-time Collection reflected signal，Obtain voltage signal，Operating characteristic according to range finding head is reduced into distance signal，Namely the infrared level measurement distance H2 between 2 and cursory 4 is obtained，In general，The scope of H2 is limited between 4cm to 50cm，That measure head due to described infrared level and distance H1 between the bottom of liquid containing container is known，Thus obtaining liquid level is H2-H1，Wherein cursory for semi-cylindrical.
The second embodiment of the present invention is to provide a kind of infrared distance measurement type liquid level sensor, this infrared distance measurement type fluid level measuring instrument includes that infrared level measures 2, infrared level measures cylinder 3, cursory 4, aperture 5 and fixing device 6, wherein, described infrared level measurement 2 is arranged on described infrared level and measures the top of cylinder 3, aperture 5 is all offered in the top and the bottom of described cylinder, thus carrying out ventilative and permeable, described infrared level measures cylinder 3 and the container containing liquid adopts fixing screw to be attached, and namely described fixing device 6 is fixing screw.nullThe operation principle of this fluid level measuring instrument is: after switching on power，Adopt range finding head，Infrared level measurement 2 is arranged on the top of test system，The position just liquid occurred，Described infrared level measurement 2 is fixed on described infrared level and measures cylinder 3 top，It is cylindrical shape that infrared level measures cylinder 3，Can also is that other shapes，Such as triangle or square tube shape or polygonal cylinder，Place in a liquid or and fluid communication，The lateral wall of cylinder adopts the container inner wall that fixing device contains with testing liquid to be connected，Described cursory 4 are placed in the inner cylinder that infrared level measures cylinder 3，Such that it is able to retrain cursory transverse horizontal motion，Cursory can be under no restraint move up and down with liquid level，Drum diameter is unsuitable excessive，Thus affect liquid level relatively low time measurement effect，Infrared level measure cylinder all offer some apertures up and down，Consequently facilitating it is ventilative and permeable，Why adopt small structure，It is mainly in view of and inside and outside liquid level both can be kept unimpeded，Can also the impact of liquid level self be reduced to minimum by the change of physical arrangement，By infrared distance measurement head，Namely infrared level measures a 2 infrared signal vertical irradiation sent on cursory 4，Single-chip microcomputer is adopted to carry out Real-time Collection reflected signal，Obtain voltage signal，Operating characteristic according to range finding head is reduced into distance signal，Namely the infrared level measurement distance H2 between 2 and cursory 4 is obtained，That measure head due to described infrared level and distance H1 between the bottom of liquid containing container is known，Thus obtaining liquid level is H2-H1，Wherein cursory for half cone-shaped.
The third embodiment of the present invention is to provide a kind of non-water flushing device of toilet adopting this infrared distance measurement type liquidometer, and lavatory tool includes apparatus for detecting human body 7, circuit control device 8, W.C.pan 9, pulverizing and centrifugal device 10, upper strata flushing liquor flushing pump 11, collection flushing liquor case 12, excrement collecting box 13, deodorization medicinal liquid automatic adding device 14 and multiple piping installation.By defecation recognizer, judge if urine, then circuit control device 8 starts the motor of upper strata flushing liquor flushing pump 11 and pulverizes the motor with centrifugal device 10, upper strata flushing liquor in collection flushing liquor case 12 is pumped the front opening flowing into W.C.pan 9 along flushing liquor pipeline by upper strata flushing liquor flushing pump 11, and W.C.pan 9 is rinsed.Wherein need the liquid level of collection flushing liquor case 12 is judged, determine whether to need to add water or other medicinal liquids auxiliary flushing stool, or liquid level is too high wants automatic drain, determining whether to start flushing process of defecating, the liquid level emasuring device adopted is the infrared distance measurement type liquidometer of the application.
The technical scheme above embodiment of the present invention provided is described in detail, principle and the embodiment of the embodiment of the present invention are set forth by specific case used herein, and the explanation of above example is only applicable to help to understand the principle of the embodiment of the present invention；One of ordinary skill in the art, according to embodiments of the invention, all will change in detailed description of the invention and range of application simultaneously, and in sum, this specification content should not be construed as limitation of the present invention.
Claims (2)
- null1. the non-water flushing device of toilet using infrared distance measurement fluid level measuring instrument，It is characterized in that: infrared distance measurement fluid level measuring instrument includes infrared level and measures head (2)、Infrared level measures cylinder (3)、Cursory (4)、Aperture (5) and fixing device (6)，Wherein，Described infrared level is measured head (2) and is arranged on the top of described infrared level measurement cylinder (3)，Aperture (5) is all offered in the top and the bottom of described cylinder，Thus carrying out ventilative and permeable，Described infrared level measures cylinder (3) and the container containing liquid adopts fixing device (6) to be attached，Infrared level is measured head (2) and is arranged on the top of test system，The position just liquid occurred，Described infrared level is measured head (2) and is fixed on described infrared level measurement cylinder (3) top，Infrared level measures cylinder (3) for cylindrical shape or triangle or square tube shape or polygonal cylinder，Place in a liquid or and fluid communication，Described cursory (4) are semi-cylindrical or half cone-shaped，Described cursory (4) are placed in the inner cylinder that described infrared level measures cylinder (3)，Such that it is able to retrain cursory transverse horizontal motion，Cursory can be under no restraint move up and down with liquid level，Infrared level measure cylinder all offer some apertures up and down，Consequently facilitating it is ventilative and permeable，The infrared signal vertical irradiation sent by described infrared level measurement head (2) is on described cursory (4)，Single-chip microcomputer is adopted to carry out the Real-time Collection of reflected signal，Obtain voltage signal，Operating characteristic according to range finding head is reduced into distance signal，Namely obtain described infrared level and measure the distance H2 between head (2) and described cursory (4)，The distance H1 measured between head (2) and the bottom of liquid containing container due to described infrared level is known，Thus obtaining liquid level is H2-H1，Described fixing device (6) is fixing screw，Described infrared level measures the distance between head (2) and described cursory (4)，Namely the scope of described H2 is limited between 4cm to 50cm，The lavatory tool of described non-water flushing device of toilet includes an apparatus for detecting human body (7)、One circuit control device (8)、One W.C.pan (9)、One pulverizes and centrifugal device (10)、One upper strata flushing liquor flushing pump (11)、One collection flushing liquor case (12)、One excrement collecting box (13)、One deodorization medicinal liquid automatic adding device (14) and multiple piping installation，The device that described collection flushing liquor case carries out level gauging adopts infrared distance measurement fluid level measuring instrument，The liquid level of collection flushing liquor case (12) is judged，Determine whether to need to add water or other medicinal liquids auxiliary flushing stool，Or liquid level is too high wants automatic drain，Determine whether to start flushing process of defecating.
- 2. a kind of non-water flushing device of toilet using infrared distance measurement fluid level measuring instrument according to claim 1, wherein said infrared distance measurement fluid level measuring instrument is arranged on directly over collection flushing liquor case, to the urine liquid level measurement within collection flushing liquor case, by defecation recognizer, judge if urine, then described circuit control device (8) starts the motor of described upper strata flushing liquor flushing pump (11) and the motor of described pulverizing and centrifugal device (10), upper strata flushing liquor in described collection flushing liquor case (12) is pumped the front opening flowing into described W.C.pan (9) along flushing liquor pipeline by upper strata flushing liquor flushing pump (11), described W.C.pan (9) is rinsed.
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| CN105507392A (en) * | 2016-01-14 | 2016-04-20 | 北京蓝洁士科技发展有限公司 | Intelligent foam water flushing toilet bowl and intelligent control method thereof |
| CN106073808B (en) * | 2016-08-25 | 2019-03-12 | 重庆恭逸科技有限公司 | A kind of urine flow rate detection closestool and its detection method |
| CN106388674A (en) * | 2016-12-14 | 2017-02-15 | 东莞理工学院 | Toilet with separation of urine and stool |
| TR201619020A2 (en) * | 2016-12-20 | 2018-07-23 | Eczacibasi Yapi Gerecleri Sanayi Ve Ticaret Anonim Sirketi | AN ELECTRONIC CONTROLLED RESERVOIR SYSTEM |
| CN108332821A (en) * | 2018-01-12 | 2018-07-27 | 合肥移顺信息技术有限公司 | A kind of water level detecting device and method based on wireless communication |
| CN109288530B (en) * | 2018-09-04 | 2021-06-25 | 曹君利 | Wireless urine volume monitor and system thereof |
| CN109916473A (en) * | 2018-09-15 | 2019-06-21 | 天津大学 | A kind of note formula liquid level measuring system and measurement method certainly |
| CN108917885A (en) * | 2018-09-26 | 2018-11-30 | 国网河南省电力公司南阳供电公司 | A kind of grid equipment oil level monitoring system based on technology of Internet of things |
| CN109374091B (en) * | 2018-10-31 | 2020-07-24 | 重庆交通大学 | Underground water level measuring device and measuring method |
| CN109855704A (en) * | 2019-02-02 | 2019-06-07 | 哈尔滨学院 | A kind of liquid level sensor |
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